What extraneous variables could have been problematic in the study of whether using night lights caused nearsightedness?
What will be an ideal response?
In this study, parents with myopia might be more likely to use night lights. Because myopia has a genetic component, the result might have been that people whose children were predisposed to nearsightedness used night lights. The lights may have been irrelevant.
The sample used in the study consisted of children in families who used an eye clinic. It is not clear that the sample was represented of children in general.
The study was retrospective, requiring parents to remember what they had done when their children were infants. This was an average of six years prior to the study, so memories may have been inaccurate.
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Under the "Motor Voter" law, citizens ______.
A. will automatically be registered to vote when they apply for or renew a driver's license B. must show a valid California driver's license or California identification card to vote in person at a polling place C. can use an expired California driver's license or California identification card to vote in person at a polling place D. when they vote in person at a polling place, must show some form of personal identification which includes any official document or utility bill with their name and address
A ______ is one that’s written in a single document.
A. codified constitution B. uncodified constitution C. entrenched constitution D. unentrenched constitution
The most basic unit in psychological research is
A) computer hardware. B) computer software. C) observed facts. D) statistical analysis.
Which of the following is NOT a reason why people choose to vote?
a. perception that their vote has an impact on the election b. pride in American democracy c. being a good citizen requires participation d. state laws that require voter participation e. sense of civic duty